I think we all more or less agree on the virtues of the Elrog 300b tubes in the GG. Although I was very hesitant to try them out due to their unreliability in the end I bought a pair. I have been so happy with their performance in my Tidal LA set up that I have not tried any of the other tubes that I have available such as a pair of Takatsuki 300B
tubes and a pair of the mesh tubes lukasz introduced a while back. Maybe I have been - just as Mike - lucky (so far) but my Elrogs are reliable. According to some the latest batches of Elrog tubes are (much) more reliable than their first 300B output. At the same time I have not made the step to insert them in my Kondo Gakuoh amps although I need a new quad of 300B tubes. Apparently I am still feeling somewhat uneasy about them.
Would be great if you could find the time to install those Taka 300b and give us your feedback.